2 files changed, 7 insertions, 4 deletions

diff --git a/server/initializers/constants.ts b/server/initializers/constants.ts
index bf99f4df6..2792d3228 100644
--- a/server/initializers/constants.ts
+++ b/server/initializers/constants.ts
@@ -287,6 +287,10 @@ const USER_ROLES: { [ id: string ]: UserRole } = {
 
 // ---------------------------------------------------------------------------
 
+const OPENGRAPH_COMMENT = '<!-- opengraph tags -->'
+
+// ---------------------------------------------------------------------------
+
 // Special constants for a test instance
 if (isTestInstance() === true) {
   CONSTRAINTS_FIELDS.VIDEOS.DURATION.max = 14
@@ -306,12 +310,13 @@ export {
   CONFIG,
   CONSTRAINTS_FIELDS,
   FRIEND_SCORE,
-  JOBS_FETCHING_INTERVAL,
   JOB_STATES,
   JOBS_CONCURRENCY,
   JOBS_FETCH_LIMIT_PER_CYCLE,
+  JOBS_FETCHING_INTERVAL,
   LAST_MIGRATION_VERSION,
   OAUTH_LIFETIME,
+  OPENGRAPH_COMMENT,
   PAGINATION_COUNT_DEFAULT,
   PODS_SCORE,
   PREVIEWS_SIZE,
diff --git a/server/initializers/migrator.ts b/server/initializers/migrator.ts
index d381551b5..3184ec920 100644
--- a/server/initializers/migrator.ts
+++ b/server/initializers/migrator.ts
@@ -35,9 +35,7 @@ function migrate () {
       return getMigrationScripts().then(migrationScripts => ({ actualVersion, migrationScripts }))
     })
     .then(({ actualVersion, migrationScripts }) => {
-      return Promise.mapSeries(migrationScripts, entity => {
-        return executeMigration(actualVersion, entity)
-      })
+      return Promise.each(migrationScripts, entity => executeMigration(actualVersion, entity))
     })
     .then(() => {
       logger.info('Migrations finished. New migration version schema: %s', LAST_MIGRATION_VERSION)